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Information Shrubs, erect, 1–3 m; burl absent; twigs sparsely to densely soft-hairy. Leaves: petiole 3–8 mm; blade gray, glaucous, dull, narrowly obovate or oblong-elliptic, 1.5–3.5 × 1–1.5 cm, base cuneate, margins entire, plane, surfaces smooth, appressed gray-canescent, gla-brescent. Inflorescences racemelike, simple or 1–2-branched; immature inflorescence pendent, (branches bell-shaped, framed by bracts), axis 0.5–1 cm, 1+ mm diam., sparsely to densely soft-hairy; bracts not appressed, leaflike, lanceolate, 5–12 mm, apex acute to obtuse, surfaces canescent or glabrous. Pedicels 5–7 mm, usually glabrous, sometimes sparsely hairy. Flowers: corolla white, conic to urceolate; ovary glabrous. Fruits globose, 6–12 mm diam., glabrous. Stones distinct. 2n = 26.

Information Shrubs or trees, either burled and resprouting after fire or not burled and killed by fire; bark usually promptly exfoliating, reddish, (thin), or, sometimes, persistent, gray, rough, shredded (A. morroensis, A. nissenana, A. nummularia, A. osoensis, A. pajaroensis, A. rudis, A. tomentosa). Stems prostrate to erect, glabrous or hairy, sometimes glandular. Leaves (usually spreading, sometimes erect, sometimes overlapping when petiole is short), usually isofacial, sometimes bifacial in stomatal distribution (stomata present only on abaxial surface) and usually in color or pubescence (A. andersonii, A. crustacea, A. edmundsii, A. insularis, A. morroensis, A. nummularia, A. pajaroensis, A. pumila, A. sensitiva, A. tomentosa, A. uva-ursi); petiole absent or present; blade ovate to elliptic, coriaceous, margins entire (serrulate in A. pacifica, rarely so in young plants or resprouts, sometimes ciliate), usually plane, rarely revolute, surfaces (smooth to papillate or scabrous), hairy or glabrous. Inflorescences racemes or panicles (panicle branches racemelike), 5–20(–50)-flowered, (partially developing with new stem growth and dormant (immature inflorescences) for 6–9 months, usually pendent, can be erect whenimmature, pendent in flower; bracts persistent, (deciduous after flowering in A. pringlei), tan or light brown, scalelike, sometimes keeled, deltate or ovate, (tips often marcescent), or hue as in leaves, leaflike, narrowly lanceolate and flat, buds usually clustered, bracts imbricate, sometimes buds spread apart on axis, bracts not imbricate); bracteoles absent. Flowers bisexual; sepals persistent, 5 (4 in A. nummularia, A. sensitiva), distinct, ovate to deltate; petals 5 (4 in A. nummularia, A. sensitiva), connate nearly their entire lengths, white to pink, corolla conic to urceolate; stamens (8–)10, included; filaments dilated, (usually hairy at base); anthers (dark red), with 2 (recurved), dorsal awns, dehiscent by terminal pores; ovary 2–10-locular; stigma capitate. Drupes red, reddish brown, or brown, globose or depressed-globose, (exocarp coriaceous, rarely thin), smooth, (mesocarp usually dry, mealy, rarely absent, endocarp multiple-seeded); pyrenes 1–10, connate or not. Seeds 1–10, distinct or connate along radial faces of stony endocarp into 2s or 3s, sometimes connate into single sphere, (triangular-ovoid). x = 13.